Gas chamber orifice



FIG. 1 is a front view of gas chamber orifice showing our new design;

FIG. 2 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for gas chamber orifice, substantially as shown and described. 